Oil-well-drilling machine



Mar. 27, 1923. 1,449,581

H. c. BREWSTER v OIL WELL DRILLING MACHINE Filed Aug. '51 1921 5 sheets-sheet 1 WITNESSES 7 7 INVENTOR Harry QBrewskr,

A TTOH/VEYS Mar. 27, 1923. 1,449,581

H. C. BREWSTER OIL WELL DRILLING MACHINE Filed Aug. 31, 1921 5 shets-sheet 2 WITNESSES I r C B IAN/5g i any rew e1; @FZQMQQL I A TTORNEVS Mar. 27, 1923.

' H. C. BREWSTER O L WELL DRILLING MACHINE 5 sheets-sheet 5 Filed Aug. 51, 1921 6 AZTOR/VEVS We u WT 3 w 7% W TIL w v mi N L m M 1 @Q w Y v \N\\\\\\\\ v d. r m T \m Ii I Q. l x m :55 9 OwQNQ N a aw wm m 3. mm u 33 -I\ I Patented Mal-.27, 1923.

UNITED sures sum: 0. newsman; or snmwaronr, LOUISIANA.

OIL-WELL-DRIL'LI NG MACHINE.

. Application filed August 81, 1921. Serial No. 487,207.

To all whom it mary concern:

Be it known that I, HARRY C. BREWSTER, a citizen of the United States, and a resident of Shreveport, in-the parish of (Jaddo and State of Louisiana, have invented certain new and useful Improvements in OiliVell-Drilling Machines, of whichthe following is a specification.

An important object of this invention is to provide a drilling machine having simple means whereby one of the sections of the drill stem may be rotated with relation to the other sections. 7

A further object of the invention is to provide a well drilling mechanism embody-.

mg inner and outer tables and meansfor holding the inner table against rotation so that the outer table which is operatively connected with the upper section of the stem or casing b means of tongs or the like may be turne' with relation to the lower section of the stem or casing, which is held against rotation by the inner table.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a plan, view of the improved drilling mechanism,

Figure 2 is a perspective of the inner table holding member which iscarried by the bed or base of the drilling mechanism,

Figure 3 is a bottom .plan .view of the im roved drilling mechanism,

Figure 4 is a vertical longitudinal sectional view-through the same,

Figure 5 is a horizontal sectional view taken on line 5-'5 of Figure 4,

Fi re 6 is a perspective of one of the mem e rs employed for holding the inner table against rotation with outer table, and

Fi re 7 is a mem er embodie Figure 8 is a taining bushing.

In the drawings, wherein forjthe purpose of illustration is shown a preferred embodiment of the invention the numeral 10 generally designates a be spaced parallel skids I ranged on opposite sides of a well so, that relation to the erspective of a gripping in the invention. group perspective of a renection with an operatmg bob (1 or base having or runners 11 ar the mechanism carried thereby may be engaged with the sections of the'stem 12 extended into thewell in the usual manner.

As illustrated in Figure 1, a metallic base plate 14 is secured upon the skids 11 by fastening devices 15 and supports a power transmitting shaft 16. One end of the power transmitting shaft 16 is provided with a sprocket wheel 17 having connection with a sprocket chain 18' extended from a suitable source of power. A clutch is mounted on the shaft 16 and consists of coacting sections 18 and 19 which when joined as illustrated in Figure 1, establish a driving connection between the sprocket wheel 17 and the shaft 16. The section 18 is rotatable on the shaft 16 while the section 19 is provided with longitudinally extending ribs 20 which non-rotatably but slidably support the section 19 on the shaft. The section 19 is moved longitudinally on the shaft 16 by means of a yoke 22' having conlever 23 of an desired construction. It will be seen that when the section 19 is disengaged from'the section 18, the driving connection between the sprocket wheel 17 and the shaft 16 will roken. 7 With reference to Figure 4, it will be observed that a pinion 25 mounted on one end of the shaft 16 is engaged with an annular series of gear teeth 26 formed on the lower side of an outer table 27; The outer table 27 may when desired be operatively connected to the upper section ofzthe drill stem by means of tongues or the like so that the rotation of the outer. table will result-in fluted upper section of rotation therewith by means ofradially movable locking bars 32 slidable in radial slots 33 in the outer table. The bars 32 of which there ma wardly Y which extend out 'throu h the up er sur'- face of the outer table 2% so that t e same may be convenientl en aged for adjustiug the bars 32. Wit re eren'ce to Figure 4, it will be seen th attlie locking bars 32 are extended into' sockets 36 formed in the inner be two, areprovided with iout-,

directed adjusting pins or studs 34:};

table 30. whereby-to cause the inner table to rotatewith the outer table when desired;

When desired, the inner table may be released from driving engagement with the outer table and may be locked to the bed 10 and thereby held in a stationary position. The lower portion of the inner table is squared to provide oppositely arranged shoulders 38 which are adapted to be flatly engaged by the opposed edges of an inner table locking member generally designated by the numeral 39. Figure 2 illustrates that the table locking member 39 is of U-shaped formation and is provided with spaced parallel side arms 40, the inner edges of which are adapted to flatly engage the opposite sides 38 of the inner table 30. When the flat inner edges of the arms 40 are flatly engaged with the sides 38, the inner table 30 is locked to the base and the outer table 27 is rotated independently of the inner table. However, when it is desired to releas the positive engagement between the inner table and the base, the holding member 39 is moved longitudinally so as to dispose recessed portions 42 in the arms 40 on opposite sides of the flat shoulders or side walls 38 and thereby permit the inner table to rotate. The connecting portion 43 of the 'U-shaped member 39 defines a handle by means of which the holding member may be moved longitudinally in the guides 45 which support the same.

As illustrated in Figure 4, an anti-friction element 46 of any desired style may be confined between theinner and outer tables so as to permit the tables to be rotated with relation to each other. e

In operation, the outer table can be locked to the inner table while turning the drill stem or casing. This is accomplished b engaging the locking bars 32 with the inner table and subsequently rotating the outer table by imparting a rotary motion to the pinion 25.

When desired, the inner table may be locked to the base and to the lower portion of the stem and a rotary motion may be imparted to the outer table 27 for causing the upper section of the drill stem to rotate. The lower section of the drillstem may be locked to the inner table by means of a pair of semicircular holding members 60 whlch as illustrated in Figure 7 have their inner sides formed with teeth 61 adapted to bite into the upper portion of the lower section 12. It will be seen that the inner side of the inner table is tapered toward its lower end so that the holding members 60 are wedged into position for holding the lower section 12 firmly in place. Handles 62 of any desired type may be connected to the upper ends of the holding members 60 to aflord a means where by the same may be readily removed when desired. The upper fluted portion of the drill stem may be locked to the upper portion of the inner table by means of a retaining weasel bushing consisting of a pair of semi-circular sections 65 each of which is rovided at its upper end with oppositely dlrected ears 66 a apted for the reception of fastening devices employed for connecting the sections 65. As illustrated in Figures 4 and 8 the sections 65 are engaged with opposite sides of the upper fluted portion of the drill stem and have their inner sides provided with grooves 67 to snugly receive the ribs of the upper fluted portion and thereby hold the upper fluted portion against rotation with relation to the inner table.

It will be observed with reference to Fig. 8 that the laterally projecting ears 66 are formed at the upper ends of oppositely directed ribs 68 which are received within grooves 69 in the bore of the inner table 30. The ribs 68 provide a driving connection between the sections 65 and the inner table so that when the inner table is positively rotated the fluted sections will also be rotated.

With reference to the foregoing, it will be seen that the holding members 60 are employed when it is desired to establish a driving connection between the lower portion of the drill stem and the inner table. When it is desired to establish a driving connection between the upper fluted portion of the stem and the inner table, the retaining bushings 65 are employed. As previously stated, the inner table may be locked against rotation by means of the member 39 and the outer table may be rotated for screwing or unscrewing the upper fluted portion of the drill 10.

I claim 1. A drilling rotary comprising a bed, inher and outer tables associated therewith, a

locking bar slidably carried by one of the tables, the other table being provided with a socket to receive said locking bar whereby lock the tables together, and means carried by the bed to lock one of thetables against rotation and consisting of a slidable member havin spaced table engaging arms,

2. g drilling rotary comprising a bed, inner and outer tables associated therewith, a locking bar slidably carried by one of the tables, the other table being provided with a socket to receive said locking bar whereby to lock the tables together, and means carried by the bed to lock one of the tables against rotation and consisting of a slidable member having spaced table engaging arms, said arms being formed with table receiving recesses.

3. A well drilling mechanism comprising a bed, a table rotatably carried thereby and having flat sides, a ill-shaped locking member having spaced parallel side arms adapted to flatly engage the sides of said table to hold the table against rotation. 1

a. A well drilling mechanism comprising a bed, a table rotatahly carried thereby and having flat sides, a U-shaped locking member having spaced parallel side arms adapted to flatly engage the sides.of said table to hold the table a ainst-rotation, the intermediate portions 0% said side -arms being provided with recesses to partially receive said table whereby to permit the same to rotate.

5. A welldrilling mechanism comprising a bed, a table rotatably carried thereby and having flat sides, a U-shaped locking member having spaced arallel side arms adapted to flatly engage t e sides of said table to hold the table against rotation, and a second table receiving said first named table.

6. A well drilling mechanism comgrisin 5 the table a ainst rotation, a second table re- 20 ceiving said first named table, and means carried by said second 'namedttable to lock said first named table thereto.

HARRY O. BREWSTER, 

